CN101066774A - Heavy calcium carbonate superfine treating process and superfine composite material preparing process - Google Patents
Heavy calcium carbonate superfine treating process and superfine composite material preparing process Download PDFInfo
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- CN101066774A CN101066774A CN 200610063447 CN200610063447A CN101066774A CN 101066774 A CN101066774 A CN 101066774A CN 200610063447 CN200610063447 CN 200610063447 CN 200610063447 A CN200610063447 A CN 200610063447A CN 101066774 A CN101066774 A CN 101066774A
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- Prior art keywords
- calcium carbonate
- heavy calcium
- superfine
- slurry
- treating process
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Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 56
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 38
- 239000002131 composite material Substances 0.000 title abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 16
- 239000011238 particulate composite Substances 0.000 claims description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 239000007822 coupling agent Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 235000011089 carbon dioxide Nutrition 0.000 claims description 6
- 102000004895 Lipoproteins Human genes 0.000 claims description 5
- 108090001030 Lipoproteins Proteins 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 claims description 5
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 5
- 238000010009 beating Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 21
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 description 30
- 238000005516 engineering process Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000005054 agglomeration Methods 0.000 description 6
- 230000002776 aggregation Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 239000008187 granular material Substances 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 238000003776 cleavage reaction Methods 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 238000009775 high-speed stirring Methods 0.000 description 4
- 230000007017 scission Effects 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 150000004645 aluminates Chemical class 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 102220042174 rs141655687 Human genes 0.000 description 3
- 238000001694 spray drying Methods 0.000 description 3
- 238000010561 standard procedure Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 206010037211 Psychomotor hyperactivity Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 1
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The superfine treatment process of heavy calcium carbonate includes the following steps: 1. mixing heavy calcium carbonate, water and surface modifier to compound slurry; and 2. superfine treatment of the slurry in a CO2 atmosphere furnace. The present invention also discloses process of preparing superfine heavy calcium carbonate composite material including the said superfine treatment process of heavy calcium carbonate. The process of the present invention has high particle fining speed and low power consumption, and the prepared superfine heavy calcium carbonate composite material has excellent performance.
Description
Technical field
The present invention relates to a kind of ultra-fine technology, particularly relate to a kind of preparation method of superfine treating process and a kind of superfine heavy calcium carbonate particulate composite of water-ground limestone.
Background technology
Superfine composite material is to be major ingredient with the superfine powder, and is equipped with a kind of matrix material that resin obtains by granulation process.
Superfine powder can be divided into ultrafine metal powders, inorganic non-metallic ultrafine powder etc. aspect kind, the most widely used at present is the inorganic non-metallic ultrafine powder, and it is the basic raw material of preparation particulate composite.Wherein, micropowder of dense calcium carbonate is a class ultrafine powder material that has biggest market and extensive use at present.
At present, the production technique of micropowder of dense calcium carbonate is a physical method, that is to say by grinding plant to be prepared from, and wherein can be divided into two kinds of dry method and wet methods.On particle fineness and size-grade distribution, wet process technique obviously is better than dry technology for production.Generally speaking, the powder of D90＜5 micron is all produced with wet processing, is the best class powder of performance in the market, but the shortcoming that wet processing exists is: because solid content can only reach 70-72%, thereby in drying process, energy consumption is bigger, and cost is higher.Secondly, simple physical method can not be worked into too thin fineness, and the thin more sudden change that just may produce the performance that is different from common powder body material of granularity.But refinement along with granularity, its surface energy is more and more higher, the aggravation of particle agglomeration phenomenon, so in the process of super-refinement, must take into full account the particle agglomeration phenomenon and solve, otherwise though powder body material has passed through ultra-fine processing, the user in use can not bring into play the due high-performance of its superfine powder.Solving the particle agglomeration phenomenon must handle by modification.The method that modification is at present handled can be divided into dry method and wet method two big classes, and wherein is most common form with the dry method.And at present technology is often after ultra-fine finishing dealing with, and in addition modification is handled again.And, adopting this mode because surface energy is huge, agglomeration can not solve very up hill and dale.
Traditional technology 1: ultra-fine-drying-modification---granulation (annotate: powder granule has reunion)
Traditional technology 2: ultra-fine-modification-drying---granulation (annotate: powder granule has reunion)
Summary of the invention
Purpose of the present invention is exactly at prior art problems, provides a kind of and can prepare the powder of high fineness, overactivity degree and the heavy calcium carbonate superfine treating process that powder granule does not have reunion.
A further object of the present invention provides a kind of preparation method of superfine heavy calcium carbonate particulate composite of superior performance.
For achieving the above object, the present invention has adopted following technical scheme:
The invention discloses a kind of heavy calcium carbonate superfine treating process, described method comprises step:
A, water-ground limestone add water, and add surface-modifying agent, are mixed with slurry;
B, the slurry that step a is obtained carry out ultra-fine processing in carbon dioxide atmosphere.
Among the described step a, the surface-modifying agent that is added accounts for 0.5～1% of water-ground limestone dry weight.
Described surface-modifying agent is preferably the aluminic acid lipoprotein coupling agent.
Among the described step a, the solid weight percentage composition of the slurry that is mixed with is 75～82%.
Among the described step a, the granularity of water-ground limestone is not more than 200 orders.
Described step b specifically is meant, the slurry input that step a is obtained stirs in the mill carries out ultra-fine processing, and described stirring mill is through encapsulation process, and in ultra-fine treating processes toward stirring in the mill feeding carbonic acid gas continuously.
Further comprise step c behind the described step b: the slurry after the ultra-fine processing is carried out the high speed making beating stir under air atmosphere, described high speed is meant that rotating speed is 600～1200 rev/mins.
Further comprise behind the described step c: slurry is sent in the pneumatic conveying dryer, and drying obtains final powder body material.
The invention also discloses a kind of preparation method of superfine heavy calcium carbonate particulate composite, described method comprises and adopts above-mentioned method that water-ground limestone is carried out ultra-fine processing.
Comprise further behind the described step c that slurry is sent in the pneumatic conveying dryer, and drying obtains final powder body material; Then final powder body material is equipped with resin and chemical assistant, prepares the superfine heavy calcium carbonate particulate composite by plastic granulator.
Because adopted above scheme, the beneficial effect that the present invention is possessed is:
The method that heavy calcium carbonate powder is carried out ultra-fine processing of the present invention, the speed of grain refine is significantly accelerated, so energy consumption descends significantly; Can be suitable for the ultra-fine processing of high solids content (more than 75%), this will play significantly energy-conservation effect for subsequent drying technology; Method of the present invention also thoroughly solves the agglomeration traits of ultra-fine grain, has improved the modified effect of superfine heavy calcium carbonate simultaneously again, can reach ultra-fine simultaneously and effect modification.By the heavy calcium carbonate powder that superfine treating process of the present invention prepares, D90 reaches 1.5 microns, and degree of activation reaches 97%, and hand is touched the imperceptible any particle of powder.
The heavy calcium carbonate powder that adopts superfine treating process of the present invention to obtain, can be used for preparing the superfine heavy calcium carbonate particulate composite, resulting superfine composite material superior performance, parameters such as tensile strength, tension fracture elongation rate, socle girder notched Izod impact strength and bending elastic modulus all are better than the superfine heavy calcium carbonate particulate composite that traditional method prepares.
Embodiment
A kind of method of heavy calcium carbonate powder being carried out ultra-fine processing, at first, granularity is not more than (heavy calcium carbonate powder dry weight 0.5～1%) surface-modifying agent that 200 purpose heavy calcium carbonate powders add water, add trace, is prepared into the slurry of solid content 75～82%.
Above-mentioned slurry is put into to stir in the mill and is carried out ultra-fine processing, is positioned in the sealed vessel and stir mill.In the time of ultra-fine processing by external device (ED) continuously, in stirring mill, feed carbon dioxide circularly.At this moment, in the stirring mill tube following chemical reaction will take place:
CaCO
3+H
2O+CO
2→Ca(HCO
3)
2
That is to say at the continuous lime carbonate of levigated particle surface and will be transformed into Calcium hydrogen carbonate and dissolve.Simultaneously, calcium carbonate crystal itself has two groups of complete cleavage again, and carbonic acid gas can enter into cleavage surface and tiny crack, further produces solvency action.So whole ultra-fine process is a grinding, particle surface dissolving, granule interior cleavage surface and physics of tiny crack dissolved and chemical process.Because the abundant application of chemical energy is arranged, so the speed of grain refine is significantly accelerated, and energy consumption will descend significantly.And because the effect of carbonic acid gas, slurry viscosity is little than the slurry of a water, so can be suitable for the ultra-fine processing of high solids content, this will play significantly energy-conservation effect for follow-up drying process.
And, the properties-correcting agent that is added, along with slurry enters into when stirring mill and carry out ultra-fine processing, properties-correcting agent constantly wraps up the particle surface of refinement, and can fully penetrate in cleavage and the tiny crack, make particle surface can contact parcel fully, reduce the particulate surface energy, make particle can not reunite again with properties-correcting agent.Thoroughly solve the agglomeration traits of ultra-fine grain, improved the modified effect of superfine heavy calcium carbonate simultaneously again, can reach ultra-fine simultaneously and purpose modification.
Above-mentioned slurry stops to feed carbonic acid gas handle for some time in stirring mill after, and slurry is released in the material stock pond that has in the high speed beating apparatus.In this process because slurry pressure descends suddenly, stir (being generally 600～1200 rev/mins) in the making beating of material stock pond high speed in addition, cause the partial pressure of carbon dioxide in the slurry to reduce rapidly, reverse the carrying out of chemical reaction above making in the step, become for:
Ca(HCO
3)
2→CaCO
3+H
2O+CO
2，
Promptly be dissolved in the Ca (HCO in the slurry
3)
2Become CaCO again
3, final product remains lime carbonate.
In the production process of reality, stir mill and can many series connection use, thereby on producing, form the successive process.
The slurry that disposes through above-mentioned steps, available pump is sent in the pneumatic conveying dryer, and is dry and obtain final powder body material.
Final powder body material is equipped with corresponding resin well-known to those skilled in the art and other chemical assistants, can obtains the superfine heavy calcium carbonate particulate composite by plastic granulator.
Superfine composite material preparation process of the present invention: superfine modified-drying---granulation (annotate: powder granule does not have reunion)
The present invention is described in further detail below by specific embodiment.
Embodiment 1
Get 100 kilograms of 200 purpose heavy calcium carbonate powders, add aluminic acid lipoprotein coupling agent (Jining De Yali polymer company limited, DYL-3 type aluminate coupling agent) 0.5 kilogram, add 28 kg of water again, make solid content and be 78% slurry.
(Wuxi City hypo drying machinery instrument factory is produced, and AXM-100 type stirs and grinds the process encapsulation process) in the above-mentioned slurry adding stirring mill carried out super-fine processing.Simultaneously, in stirring mill, feed carbonic acid gas continuously by external device (ED).
After 20 minutes, emit slurry to and have in the material stock pond of high-speed stirring blade, start agitating vane, rotating speed is set in advance in 900 rev/mins.
After 5 minutes, slurry with being pumped into dry (production of Changzhou development drying plant company limited) in the QPG-5 type pneumatic spray drying machine, is obtained superfine modified water-ground limestone.Use the laser particle size analyzer analysis, the D90=1.5 micron; By National Standard Method test degree of activation is 97%; Hand is touched the imperceptible any particle of powder.
This powder is added 20 kilograms of LDPE resins, 200 gram white oils, (Nanjing Rubber-Plastic Machinery Plant's 75 types) cause particle in plastic granulator, obtain superfine heavy calcium carbonate particulate composite A.
Comparative Examples 1
Get 100 kilograms of 200 purpose heavy calcium carbonate powders, add 43 kg of water again, make solid content and be 70% slurry.
(Wuxi City hypo drying machinery instrument factory is produced, and AXM-100 type stirs and grinds the process encapsulation process) in the above-mentioned slurry adding stirring mill carried out super-fine processing.
After 20 minutes, emit slurry to and have in the material stock pond of high-speed stirring blade, start agitating vane, rotating speed is set in advance in 900 rev/mins, adds aluminic acid lipoprotein coupling agent (Jining De Yali polymer company limited, DYL-3 type aluminate coupling agent) 0.5 kilogram.
After 5 minutes, slurry with being pumped into dry (production of Changzhou development drying plant company limited) in the QPG-5 type pneumatic spray drying machine, is obtained superfine modified water-ground limestone.Use the laser particle size analyzer analysis, the D90=12.5 micron; By National Standard Method test degree of activation is 40%; Hand is touched powder can feel some small-particles.
This powder is added 20 kilograms of LDPE resins, 200 gram white oils, (Nanjing Rubber-Plastic Machinery Plant's 75 types) cause particle in plastic granulator, obtain superfine heavy calcium carbonate particulate composite B.
Comparative Examples 2
Get 100 kilograms of 200 purpose heavy calcium carbonate powders, add 43 kg of water again, make solid content and be 70% slurry.
(Wuxi City hypo drying machinery instrument factory is produced, and AXM-100 type stirs and grinds the process encapsulation process) in the above-mentioned slurry adding stirring mill carried out super-fine processing.
After 20 minutes, emit slurry to and have in the material stock pond of high-speed stirring blade, start agitating vane, rotating speed is set in advance in 900 rev/mins.
After 5 minutes, with slurry with being pumped in the QPG-5 type pneumatic spray drying machine dry (production of Changzhou development drying plant company limited).The laser particle size analyzer analysis of dried powder, the D90=15 micron.
Then that drying is good powder adds the high speed kneader, and (Zhangjiagang Machinery Plant of Light Industry makes; SHR-300 type); add aluminic acid lipoprotein coupling agent (Jining De Yali polymer company limited simultaneously; DYL-3 type aluminate coupling agent) 0.5 kilogram; 5 minutes temperature of high-speed stirring rise to 150 ℃ and become low speed; high low speed like this is alternately shut down discharging after keeping the fast state cumulative time to reach 20 minutes, and amounting to modification time is 63 minutes.By National Standard Method test degree of activation is 56%, and hand is touched powder can feel more particle.
This powder is added 20 kilograms of LDPE resins, 200 gram white oils, (Nanjing Rubber-Plastic Machinery Plant's 75 types) cause particle in plastic granulator, obtain superfine heavy calcium carbonate particulate composite C.
Experimental example
The application performance contrast of superfine heavy calcium carbonate particulate composite
Sample title: PP
Test purpose: performance test
Preparation method and sample appearance: this coloured particles adds 30 parts of superfine heavy calcium carbonate particulate composites, injection moulding sample preparation envrionment conditions: temperature/relative humidity (23 ± 2) ℃/(50 ± 5) %
Pre-treatment: dried 2 hours for 110 ℃
| Numbering | Test event | Unit | Test result | Testing method |
| A | Tensile strength tension fracture elongation rate socle girder notched Izod impact strength bending elastic modulus | Mpa ％ KJ/m 2 Mpa | 29.0 14 6.5 42.8 | GB/T1040-1992 GB/T1040-1992 GB/T1843-1996 GB/T9341-2000 |
| B | Tensile strength tension fracture elongation rate socle girder notched Izod impact strength bending elastic modulus | Mpa ％ KJ/m 2 Mpa | 19.0 6 2.3 39.8 | GB/T1040-1992 GB/T1040-1992 GB/T1843-1996 GB/T9341-2000 |
| C | Tensile strength tension fracture elongation rate socle girder notched Izod impact strength bending elastic modulus | Mpa ％ KJ/m 2 Mpa | 21.0 4.2 2.5 37.9 | GB/T1040-1992 GB/T1040-1992 GB/T1843-1996 GB/T9341-2000 |
Claims (10)
1, a kind of heavy calcium carbonate superfine treating process, described method comprises step:
A, water-ground limestone add water, and add surface-modifying agent, are mixed with slurry;
B, the slurry that step a is obtained carry out ultra-fine processing in carbon dioxide atmosphere.
2, a kind of heavy calcium carbonate superfine treating process according to claim 1, it is characterized in that: among the described step a, the surface-modifying agent that is added accounts for 0.5～1% of water-ground limestone dry weight.
3, a kind of heavy calcium carbonate superfine treating process according to claim 2 is characterized in that: described surface-modifying agent is the aluminic acid lipoprotein coupling agent.
4, according to any described a kind of heavy calcium carbonate superfine treating process of claim 1～3, it is characterized in that: among the described step a, the solid weight percentage composition of the slurry that is mixed with is 75～82%.
5, a kind of heavy calcium carbonate superfine treating process according to claim 1 is characterized in that: among the described step a, the granularity of water-ground limestone is not more than 200 orders.
6, according to any described a kind of heavy calcium carbonate superfine treating process of claim 1～5, it is characterized in that: described step b specifically is meant, the slurry input that step a is obtained stirs in the mill carries out ultra-fine processing, described stirring mill process encapsulation process, and in ultra-fine treating processes, feed carbonic acid gas in the mill continuously toward stirring.
7, according to any described a kind of heavy calcium carbonate superfine treating process of claim 1～6, it is characterized in that: further comprise step c behind the described step b: the slurry after the ultra-fine processing is carried out the high speed making beating stir under air atmosphere, described high speed is meant that rotating speed is 600～1200 rev/mins.
8, a kind of heavy calcium carbonate superfine treating process according to claim 7 is characterized in that: further comprise behind the described step c: slurry is sent in the pneumatic conveying dryer, and drying obtains final powder body material.
9, a kind of preparation method of superfine heavy calcium carbonate particulate composite, described method comprise and adopt any described method of claim 1～7 that water-ground limestone is carried out ultra-fine processing.
10, the preparation method of a kind of superfine heavy calcium carbonate particulate composite according to claim 9 is characterized in that: comprise further behind the described step c that slurry is sent in the pneumatic conveying dryer, and drying obtains final powder body material; Then final powder body material is equipped with resin and chemical assistant, prepares the superfine heavy calcium carbonate particulate composite by plastic granulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100634479A CN100562494C (en) | 2006-11-02 | 2006-11-02 | Heavy calcium carbonate superfine treating process and superfine composite material preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100634479A CN100562494C (en) | 2006-11-02 | 2006-11-02 | Heavy calcium carbonate superfine treating process and superfine composite material preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101066774A true CN101066774A (en) | 2007-11-07 |
| CN100562494C CN100562494C (en) | 2009-11-25 |
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ID=38879496
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701174A (en) * | 2012-05-11 | 2012-10-03 | 上海大学 | Superfine processing and grain diameter control method of powder materials |
-
2006
- 2006-11-02 CN CNB2006100634479A patent/CN100562494C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701174A (en) * | 2012-05-11 | 2012-10-03 | 上海大学 | Superfine processing and grain diameter control method of powder materials |
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|---|---|
| CN100562494C (en) | 2009-11-25 |
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Effective date of registration: 20090213 Address after: Room A807, A international business incubator Guangzhou International Science Town, Guangzhou, Guangdong Province, China: 510663: Applicant after: Bi Shu Address before: 46, Rhine garden, Luoxi garden, Guangdong, Guangzhou, Panyu 511430, China Applicant before: Li Yuwen |
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Effective date of registration: 20160318 Address after: China one high-tech industrial park in Hubei province 430080 Qingshan District of Wuhan city (No. 180 building 302 room 1 metallurgical Avenue) Patentee after: Wuhan Longxing Yu environmental protection equipment Co. Address before: 510663 A807 room, A international business incubator, small town scientific town, Guangzhou, Guangdong, Dongpu, Guangzhou Patentee before: Bi Shu |